1266801790 has 8 divisors (see below), whose sum is σ = 2280243240. Its totient is φ = 506720712.

The previous prime is 1266801787. The next prime is 1266801793. The reversal of 1266801790 is 971086621.

It is an interprime number because it is at equal distance from previous prime (1266801787) and next prime (1266801793).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266801793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63340080 + ... + 63340099.

It is an arithmetic number, because the mean of its divisors is an integer number (285030405).

Almost surely, 2^1266801790 is an apocalyptic number.

1266801790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1266801790 is a deficient number, since it is larger than the sum of its proper divisors (1013441450).

1266801790 is a wasteful number, since it uses less digits than its factorization.

1266801790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126680186.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 1266801790 is about 35592.1591084329. The cubic root of 1266801790 is about 1082.0223281723.

The spelling of 1266801790 in words is "one billion, two hundred sixty-six million, eight hundred one thousand, seven hundred ninety".